bebg-mann



(No Model. 3 Sheets-Sheet 1.

- S. BERGMANN.

ELECTRIC ARC LAMP. No. 561,560. PatentedJune 9, 1896.

(No Model.)

3 SheetsSheet 2.

S. BERGMANN.

ELECTRIC ARC LAMP.

No. 561,560. Patented June 9, 1896.

w {LL 1 .J-L a 4 I M a 7 2 L i 45 E1 6 y i I 4 ,1 a H WWW 1 a l o u o flinessew n fiu/wzi'o'rx (No Model.) 3 SheetsSheet 3.

S. BERGMANN.

ELECTRIC ARC LAMP.

No. 561,560. Patented June 9, .1896- if 736619865 jhvenfm? AZ 1flllowzey UNITED STATES PATENT OFFICE.

SIGMITND BERGMANN, OF NEW YORK, N. Y., ASSIGNOR TO THE GENERALINOANDESOENT ARC LIGHT COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 561,560, dated June 9,1896.

Application filed February 27,1895. Serial No. 589,839. (No model.)

To aZZ whom it may concern.-

Beit known that I, SIGMUND BERGMANN, of the city, county, and State ofNew York, have invented a certain new and useful Improvement inArc-Lamps, of which the following is a specification.

I will describe an arc-lamp embodying the features of my improvement,and then point out the novel features in a claim.

In the accompanying drawings, Figure l is an clevational view of a lampembodying the features of my improvement. Fig. 2 is a view similar toFig. 1, but shows the lamp as viewed from a position at right angles tothat which results in Fig. 1. Certain parts are shown in section in thisview. Fig. 3 is a plan view of the lamp, parts being shown in section.

Similar letters of reference designate corresponding parts in allfigures.

As my present improvement relates more particularly to the constructionand mode of operating the feeding mechanism of the lamp, I have shownsuch parts and parts necessary for a full understanding of my inventionin detail, while other portions to which my invention does not relateare not so shown or are wholly omitted.

A designates a platform or support carrying the feed-controllingmechanism of the lamp. For inclosing and protecting such mechanism ahood A is provided, elevated above the support A and secured thereto bystanchions a a.

The support A may be provided with a transverse flange a, and the hood Awith a transverse flange (o to offer suitable facilities for thesecuring of an encircling shell (not shown) joining the peripheralportions of the support and hood.

A is an upright tubular piece secured to the hood A and having its borein line with the movable carbon-support B.

A and A are suitable clamping devices or binding-posts formed on thehood A and adapted to receive the terminals of the circuit supplying thelamp.

The carbon-support B is of rod-like form and is here shown as having anangular crosssection. It passes freely through suitable apertures in thesupport A and the hood A.

In the present instance the operative parts of the feed-controllin gmechanism are notcar- 'ried directly in the platform A, but are carriedby an independent frame comprising a lower plate 0, an upper plate C,and connect 5 5 ing side pieces C 0 The lower plate 0 of the frame issecured to the support A, but in a manner to be insulated therefrom.

D D are electromagnets whose cores dd are fitted between an uppercross-piece or yoke d, of magnetic material, attached to plate 0', andblocks d d of non-magnetic material, carried by the lower plate O. Thisdouble support of the cores gives additional strength.

E is a vibrating frame pivoted to the side pieces 0 0 For this pivotalsupport I have in the present instance provided the shaft e of the framewith cup-shaped ends, adapted to receive the pointed ends of screws 66'', e11- tering tapped holes in the side pieces. The screws 0 e may beprovided with lock-nuts e c to firmly secure them in position whenadjusted.

The vibrating frame E includes arms E, extending on both sides of theshaft (2, and they may be secured to the latter. For this purpose theend portions of the shaft may be reduced in diameter and provided withscrewthreads. The arms E E may be provided with suit-able openings toslip over the reduced portions and contact with the shoulders formed bythe enlarged central portion of the shaft. They may be secured in placeby nuts e 6 That end of the frame E adjacent to the magnets D D carriesa block of magnetic material, as soft iron, F, forming the armature ofthe magnets. G is a slip-and-gri-p clutch embracing the carbon-support Band operated by the outer or free ends of the arms E E and the vibratingframe E. In the present instance this clutch comprises a clutch-plate G,provided with an opening similar in shape to the cross-section of thecarbon-support B, but slightly greater in area. Consequently when theclutch-plate G is in such a position that the opening through it is inalinement with the carbon-support the latter will freely slip back andforth through the same; but when the plate is tilted at one end it willgrip the carbon-support B and prevent the longi In the pres IOO tudiualmovement of the same.

the arms E E of the vibrating frame E at their outer extremities. WVhenso carried, the clutch-plate G will be tilted, as the line joining itspoints of support does not pass through the center of gravity of theplate, and opposite sides of the opening in the plate G will be forciblypinched against opposite sides of the carbon-support, holding the samefrom sliding through the clutch. If, however, the clutch-plate G issupported on both sides of the carbon-support B, the plate may be causedto assume a position in which the clutch-opening is in alinement withthe support B. The latter will then be permitted to freely slide throughthe opening. For this purpose the armature end of the vibrating frame Eis provided with a lug 9?, adapted to contact with the stud g when theframe has been drawn upward by the action of the magnet. The stud. g maybe in the form of a screw provided with a lock-nut for the purposes ofadjustment. The magnets D D are here shown as having their coils inshunt with the circuit through the carbons through an interposedcircuit-breaker.

For a better understanding of this circuitbreaker and its operation Iwill first premise that one of the line-terminal binding-postsin thepresent. instance Af-is electrically connected to one of the side plates0 which latter is in electrical contact with the upper-carbon support 13by means of a brush II, at tached to the side plate and bearing againstthe support. The lower carbon is electrically connected to thebinding-post A I will describe the circuit-breaker interposed in thecircuit of the magnet-coil. I is a block supported on the upper plate C,but insulated therefrom. It is provided with an arm I, pivoted to theblock by a suitable screw '6 and drawn to one side by a spring 1'. Itsfree end extends outward and contacts with the support B. It is providedwith a piece of insulating material 1? at its lower outer surface,which, when the support B has descended to its lowest point, bears uponthe top of the support, holding the metallic porthe block I to preventthe withdrawal of the arm too far to one side.

The coils of magnets D D form continuations of each other. One end 'ofone coil is attached to the block I, while the free end of the oppositecoil may be connected with the circuit-wire leading to the binding-postA The frame E will preferably be supplied with an adjustable weight Lfor the purpose of adjustment. M is a stretcher extending between theside pieces 0 C and embracing the support B, its purpose being tocontact with the clutch-plate G, if the latter is accidentally carriedupward, and disengage the same from the support B.

The clamp for the carbon-rod carried by the support B maybe of anysuitable design. In the construction shown the extremity of the supportB is ball-shaped, while the clamp is composed of two members, one ofwhich, N, is secured to the ball to swivel about the same, while theother member, N, of the clamp is provided with a tongue or, entering arecess in the part N, and having a slot, through which passes athumb-screw engaging with a tapped hole in the member N.

The lower-carbon support may be of any suitable design, and as it formsno part of my invention I have not considered it necessary to illustratethe same.

It will preferably be carried by arms 0 O, secured to the platform A.One or both of the arms may be hollow and the wire leading tothelowercarbon may pass down the same.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is

The combination of a movable carbon-support, a clutch for coacting withthe support, a pivoted frame provided with arms on each side of thecarbon-support which are adapted to impinge against the clutch and causeits engagement with the support, a stop-piece also adapted to impingeagainst the clutch and cause its disengagement from the support, and ashunt-electromagnet for moving the pivoted frame, substantially asspecified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

SIGMUND BERGMANN.

IVitnesses:

P. H. KLEIN, Jr., P. H. MoWREY.

